Anyone have any idea what kind of bug builds a shell out of leaf and plant material? About an inch long, and they're hanging from the underside of our hop leaves but they're not permanently affixed... they can and do move as they eat. They're eating the crap out of the hops and the "shells" are made of bits of leaf and debris bound together by whatever sticky crap the insect excretes to build it's protective layer. Google has failed me so far.